Independent-hot-spot approach to multibeam laser-plasma instabilities.

Follett, R K; Wen, H; Froula, D H; Turnbull, D; Palastro, J P · Phys Rev E · 2022

basic_science · Level V

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Abstract

The independent-hot-spot model is used to develop an analytic formulation for multibeam laser-plasma instabilities in inhomogeneous plasmas. The model is applied to the absolute two-plasmon-decay instability and shows good agreement with simulations and experiments. The success of the model indicates the emergence of single-speckle behavior for sufficiently large speckles sizes.